Discharge apparatus for pumps



Nov. 9, 1954 L. H. PIERCE 2,693,758

DISCHARGE APPARATUS FOR PUMPS Filed Oct. 9, 1950 I Lewis H. Pierce 36 4 INVENTOR,

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United States Patent Ufitice 2,693,758 Patented- Nov. 9, 1954 nIscnAnGE APPARATUS FOR PUMPS Lewis 11.. Pierce, MankatmMinm; Rose Pierce administratrix of said Lewis H..Pierce,-, deceased Application October 9, 1950, Serial No. 189,173

2 Claims. (Cl. 103--6) The present invention relates to improvements in underground discharge apparatus for pumps, and more particularly to an improvement on my discharge apparatus for pumps, Patent No. 2,253,046 issued August 19, 1941.

An object of the present invention is to provide a pump apparatus which is easily installed in a working position and easily disconnected therefrom, whereby liquid may be discharged from the underground well into a pressure storage tank.

A further object of the present invention is to provide a structural arrangement wherein the liquid pump casing, the air pump tubular member and the coupling sleeve may be simultaneously removed from the well for repair or replacement of the parts.

Still another object of the present invention is to provide an air pump in combination with a liquid pump whereby air may be supplied along with the liquid to the pressure storage tank in order that the tank will not become water locked.

Another object of the present invention is to provide an underground discharge whereby the liquid from the well is supplied to a pressure storage tank which is located in a convenient place away from freezing where it is impractical to have a well pit at the Well.

Various other objects and advantages will be apparent from the detailed description to follow.

The best form in which I have contemplated applying my invention is illustrated in the accompanying drawings, wherein:

Figure l is a vertical sectional view of the discharge apparatus of the present invention;

Figure 2 is a horizontal transverse sectional view taken substantially on the plane of line 22 of Figure 1;

Figure 3 is a horizontal transverse sectional view taken substantially along the plane of line 33 of Figure l; and

Figure 4 is a horizontal transverse sectional view taken substantially along the plane of line 44 of Figure 1.

Referring more particularly to the drawings, wherein like numerals designate like parts throughout, numeral designates generally the well casing in which the apparatus of the present invention is positioned. Numeral 12 is an extension of the well casing 10 which is connected to the well casing portion 10 by means of the outer coupling sleeve 14, and the lower well casing 12 extends downwardly into the earth to the source of the liquid. The

upper wcll casing 10 is secured to the outer coupling memher 14 at 16 by any conventional means such as weld, and the lower well casing portion 12 is threadedly mounted within the threaded bore 18 of the coupling member 14. The coupling member 14 is also provided with a transversely extending and internally threaded bore 20 in which is threadably mounted a discharge conduit 22 which is adapted to be in communication with a pressure storage tank, not shown.

Threadably mounted within the threaded bore 18 of the outer coupling member 14 is an inner coupling sleeve 24 provided with a transverse bore 26 allowing communication between the inner chamber 28 and the discharge conduit 22.

The inner coupling sleeve 24 is provided with a vertical drain port 30 for a purpose to be hereinafter described.

The inner coupling sleeve 24 has threadably mounted therein a bushing element 32 which is provided with a central aperture having internal threads at 34 for threadably receiving the lower well tubing 36 rising from a conventional underground pump cylinder as in my Patent No. 2,253,046, said cylinder forming part of a pump having oppositely acting check control valves as in Patent No. 1,214,902.

Threadably mounted within the upper open end of the inner tubular sleeve coupling member 24 is a common coupling sleeve 38 provided with a first and axially extending bore 40 having internal threads, and a second parallel and internally threaded bore 42 in an offset portion of the sleeve 38;. Anair' discharge duct 44 provides communication between the bore 421 and the chamber 28,. thus providing communication to the discharge conduit 22 and the pressure storage tank, said duct being of greatly restricted diameter as compared with that of the bore 42.

Threadably mounted within the threaded bore 40 of the common coupling sleeve 38 is a liquid pump casing 46. Fixedly secured to the upper end of the liquid pump casing 46 is a well tube 48. The liquid pump casing 46 is also provided with a transversely extending aperture 50 adjacent its upper end whereby water may be drained from the pump casing down to the drain port 30.

Reciprocably mounted within the liquid pump casing 46 is a sucker rod 52 having a pump piston 54 mounted thereon which is of the inverted cup type and adapted to exert pressure downwardly under the down stroke of the sucker rod 52. The sucker rod 52 is provided at its lower end with a short sleeve coupling 56 whereby the lower sucker rod section 58 may be secured thereto, said section 58 extending upwardly out of the tubing 36 from said pump casing as in my before mentioned patent.

Reciprocably mounted within the air pump tubular member 60 which is threadably secured in the bore 42, is an air pump rod 62 having a piston 64 mounted on its lower end of the downwardly acting flexible inverted cup type adapted to pass air from above said piston by the same during the upstroke of said piston so that air in said member 60 above said piston 64 may find its way below said piston during said upstroke.

From the foregoing, it is believed that the operation of the structure of the present invention will be readily apparent to one skilled in the art. The liquid is pumped on the upstroke of the sucker rod 58 from the well up the tubing 36 into the chamber 28 by means of the usual pump piston in said pump cylinder, not shown, and out of said chamber through the discharge conduit 22 during the down stroke of the sucker rod 58 by the pump piston 54 all as in my previously noted patent. Inasmuch as the air pump 64 is simultaneously operable with the liquid pump 54, air will be pumped by the down stroke of the piston 64 through the discharge duct 44 and discharge conduit 22 whereby the pressure storage tank (not shown) will be supplied with both air and liquid under pressure. It will also be seen that back pressure against the piston 54 is relieved through the port 50 and drain port 30, and any liquid leaking past the piston 54 into the upper casing section 10 will be drained out the drain port 30. As will be seen, the duct 44 is greatly restricted in diameter as compared with the internal diameter of the member 60 so that water rising above the cham ber 28 will find its way into the member 60 slowly and in small amounts, during the upstroke of the piston 64, and will be prevented from filling the member 60 below the piston 64 by air in said member 60 below said piston 64 forming an air block. Hence, upon the downstroke of the piston 64, it will be etfective to force such water by air pressure out of the member 60 and duct 44 to pump a sufficient amount of air through the chamber 28 and conduit 22 for the purpose intended.

It is believed that from the foregoing a device has been provided which will accomplish all of the objects hereinabove set forth.

Having thus described my invention, what I claim to be new is:

1. In a well pump, an upper liquid pump casing, a lower well tubing, a sleeve coupling connecting said casing and tubing in spaced apart relation and forming a relatively larger diameter liquid receiving chamber therebetween for receiving liquid from said well tubing, said chamber having a side discharge port, a sucker rod reciprocable in said casing and tubing, a downwardly acting pump piston on said sucker rod operating in said casing for forcing liquid out of said chamber through said port, a vertical bore in said coupling at one side of said casing and above said chamber, a tubular air pump casing rising out of said bore, a reciprocable air pumping piston in said air pump casing passing air thereby upon the upstroke thereof and acting to compress such air below the same during the down stroke of said air pumping piston, and a restricted duct leading from the bottom of said bore into said chamber for passing air compressed in said pump casing by said air pumping cylinder through said chamber and out of said port with the liquid forced out of said chamber by said first named piston.

2. In a well pump according to claim 1, said coupling including outer and inner sleeve sections with the inner sleeve section threaded into the outer sleeve section and said liquid pump casing and air pump casing being con- 4 nected to said inner section for removal therewith by unscrewing the mner section out of the outer section.

References Cited in the file of this patent UNITED STATES PATENTS 

